fuller



April 29,1930.

F. L. FULLER CASH REGISTER Originl Filed May 23, 1919 2 Sheets-Sheet 1 K J S 5 5 N m w W M m m m n u D T A T D a GEE hmmmt w w m@wa@@@@@@@ gnuenlo'o Frederick L. Fuller M r I I His 1 F. L. FULLER 7 CASHREGISTER April 29, 1930.

Original Filed May 23, 1919 2 Sheets-Sheet 2 gum/Mica: I Frederick Fuller M Patented Apr, 29, 1930 UNITED STATES PA-TENT; v OFFICE FREDERICK L. FULLER, OI ILION, YORK f ASSIGNOR '.I.O THE NATIONAL CASH REGISTER COMPANY, 01' DAYTQN, OHIO, A CORPORATION 01 MARYLAND casn BEGI-STER,

Original application filed Iay as, 1819,8eria1 1T0. 299,112. mvmea and um application mm mm 7,

1927. Serial This is a division of the application for Letters Patent of the United States of Frederick L. Fuller, SerialNo. 299,112, filed May The objects of the present improvement are to provide:

A novel release mechanism, controlled by various manipulative devices, soconstructed that a certain predetermined number of manipulative devices must be operated before the release of the machine is efiected. y

- To combine with the release mechanism, above mentioned, a device. actuated by the total lever so that, after movement of the total lever, to control the machine to perform 1 a total or sub-total o eration, a manipulative device in any bank selected by the total lever may be operated to effect the release of the machine, the manipulative devices in the other banks being locked against operation.

,An improved form of interlocking mechanism controlled by the total lever and cooperating with the zero stop pawls of the various controlbanks of manipulative devices.

With these and incidental objects inview, the invention consists of certain novel features of construction and combinations of parts, the essential elements of which are set forth in ap ended claims, and'a preferred form or embo iment oi. which is hereinafter described with reference to the drawin which accompany and form part of this specification.

Of said drawings: Fig. 1 is a diagrammatic view of the three banks of control keys and the total 1ever.

Fig. 2 shows the operating connections from the motor to the main cam shaft, and

alsothe connections to the machine release mechanism.

Fig. 3 shows theconnections from the o crating handle to the main cam shaft, t e mechanism for operating the machine release mechanism, and the connections for permitting tw rotations of the cam shaft during total ogerations. 1. p

Fig. 4 shows the connections from the total lever to the machine release mechanism and all,

banks, and

" portion of the interlocking device between.

the total lever and the control keys.

Fig. 5 is 'a detail plan view, partly-in section of the machine release mechanism.

Fig. 6 is a view in left elevation, partly broken away, of the clerks control key bank.

Fig. 7 is a perspectiye view of the interlocking mechanism between the control between said control banks and the total lever. Y

Fig. 8 is a detail fragmentary view of the releasing bar and arm showing their relation to the clerks keys.

General deamriptim- I Since this is a divisional ap lication only so much of the mechanism of tlie parent case isshown as is necessary to fully illustrate the interlocking mechanism comprising this invention. a s

Therefore, the amount'keys, tial mechanisms, the totalizers, the indicators and the printing mechanism are not shown and will not be described in.-'thiscase'."; Since the interlocking mechanism zapplie's'lonly to" the banks of control keys and the total lever,' 7

differen such kefys only are illustrated herein. In t the pre erred iform these keys bear? charac= ters adapted more especially for use in mar 'kets and such analogofis lines of businesses.

However, applicant does not wish'to limit 'his invention to machines which can be used in markets only, because the characters on the keys may be readily changed to fit the requirement of many'lines of business. Described 1nv general terms, thls invention includes an interlocking mechanism arranged to cooperate with the three banks of control keys and the total lever in such a manner as to always require, during addinoperations, the depression of a key in each ank, and at the same time prevent an operation of the total lever during adding operations. It also compels the total lever to be in'the .add position priorto the depression of-any of the keys for an adding operation.

The interlocking mechanism also, cooperates with the -control keys and total lever during total and sub-total operationsin such a manner that, when the total lever is moved 35 1s shown 1n F g. 2; A worm gear 30, which to the transaction position, only a key in the transaction bank can be depressed, the

keys in the other banks being locked out.

Likewise, when the total lever is moved to the department position, only a key in the department bank can be depressed, the keys in the other two banks being locked out. When the total lever is moved to the clerks position, then onlya key in the clerks bank may be depressed, the keys in the other two banks being locked out.

The interlocking mechanism is so interrelated with the machine releasing mechanism that all of the above functions are accomplished, so that there can be namis-registration on the part of the operator when a sale is recorded. The mechanism also prevents a ,mis-operation by the proprietor when he either reads or resets the various totalizers in the machine to which thisinvention is ap-' The motor mechanism convenient to use in connection with thepresent invention is of awell known type, and described in United States Letters Patent No. 1,144,418, granted to Charles F. Kettering and William A. Chryst on June 29, 1915. For a detailed description of the same, reference may be had to this patent. The only part .of the motor mechanism necessary to illustrate inthis case forms part of a motor clutch device, is loosely mounted on a stud 31 carried by the machine side frame. This worm gear 30 is rotated by a worm 32 on the armature shaft of the motor (not shown) The motor clutch has three locking disks, only one of which, 33, is shown.

electric circuit, as is fully illustrated and described in the Kettering and Chryst patent 'above mentioned. -The upper end of the lever 35 carries a roller 37 normally resting on a curved 'surface 38 of an arm 39 fast upon a shaft 40. When the arm 39 is rocked clockwise (Fig. 2) to release the'machine, as v.will

be hereinafter described, the lever 35 is rocked clockwise, by a spring 45, and disengaged from the stop plates 34, whereupon the disks, and parts operated thereby, are moved, by spring action, to effect the connection of the motor clutchand the closing of the circuit.

through the'motor as described in the Ketterlng -and Chryst patent. The lever 35 is limited in its clockwise movement by a stud 46' on the machine frame.

A gear 47 is secured to the motor clutch and meshes with an intermediate gear 48 meshing with a gear 49 fast on the main cam shaft 50.

Through this'gearing and the motor clutch, the motor (not shown) drives the shaft 50 one complete rotation for each adding operation of the machine.

' To restore the locking lever 35 to normal position near the end of the operation of the machine, a link 55 is pivoted to said lever. The link 55 is uided inits movements by its slot-56 embraclng a stud 57 on the machine frame. The gear 48 carries a stud 58 which, near the end of the operation of the machine,

contacts the lower surface 59 of the link 55,

thus raising the link and thereby moving the locking lever 35 to its normal locking position.

As will be later described, the arm 39 is rocked to its normal position just befor the stud 58 passes off the surface 59, in or er to retain the lever 35 in its normal position.

Since, in some cases, it may be desirable to operate the machine by hand instead of by motor, a'manual operating mechanism is provided in addition to the motor driving mechanlsm.

A hand crank- (not shown), carrying a gear 65, (Fig. 3) is mounted upon a stud 66 carried 1 by the machine side frame, and may be held against longitudinal movement on the stud 66 in any desired manner.

The gear 65 ineshes with a gear 67 rotatably mounted on a stud 68 in the machine frame. This gear 67, in turn, meshes with a gear 69 fast on the cam shaft 50. The ratio of the gears 65, 67 and 69 is such that two rotations of the gear65 cause a half rotation of the gear 67 and a complete rotation of the gear 69. The functions of,the arm 39 and the lever 35 are the same as described in connection with the motor drive. The only difference in the two driving means resides in the fact that in one case the shaft 50 is rotated by a motor, and in the other case by a hand operated crank.

' Key board- That part of the keyboard shown in this case comprises a bank of clerks keys (Fig. 1), a bankof department keys 76, a bank of transaction keys 77 and a total lever 78. The construction of the department and transaction key banks is very similar to that shown and described in a patent granted to the applicant, No. 1,242,170, on October 9, 1917, hence a very brief description will suffice here.

In this case, as in the parent case, the clerks keys are in reality true keys, since they are removable and, when put in the machine, are inserted in a lock barrel 80 (Fig. 6) carried by a frame 81 superimposed on a regular key .frame 82, mounted-on rods 83. In the present instance, only four clerks keys are shown, but, as is perfectly clear from the diagrammatic view in Fig. 1,

nine may be used. As this construction is.

fully illustrated and described in the parent case, it will be sufiicient here to say that the clerks keys cooperate with key stems 84 mounted in the usual manner in the key frame82s.

The key stems 84 cooperate with studs 85 on aflexible detent 86 carried by arms"8 7 and 88 pivoted in the key frame 82. When a key stem 84 is depressed by akey 75, the detent 86 1s first moved downwardly until the shoulder 89 is beneath the stud 85, after which said detent is moved upwardly and the flat portion of the stud 85 engages the shoulder 89, thus locking the key in depressed position and holding the detent in its moved position; The arm 88 engages a pin 95 on a zero stop pawl 96, pivoted in the key frame and held in normal position by a spring 97 V The key stems 84 also carry pins 98 which cooperate wlth slots 99 in a releasing bar 100 I 101 mounted in the key frame, and at its lower end to an arm (not shown). The arm' 101 has a pm 102 embraced by a slotted arm (Fig. 8), pivoted at its-upper end to an. arm

103 (Figs. 5 and 6), integral with a sleeve 104 loose upon a. shaft 105. Also integral with the sleeve 10 1. is an arm 106, the free endof which normally restsin front of one of two L-shaped arms 107 integral with a sleeye 108 loose on the mac 40. "The sleeve 108 has a projection'109 emlZSaced by a slotted arm 110 fast on the shaft 8 1.' This key bank has a flexible detent 86 (Fig. 5) which cooperates with a zero stop pawl 113 (Fig. 7 a releasing bar 100 (Fig. 5); an arm 101 and a pin 102 cooperating with an arm 103 on a sleeve 104. This sleeve 104 has integral therewith an arm 111, the free end of which lies in front of an L-shaped arm 112 integral with the sleeve 108.

The transactidn bank is like 'the department bank, except that it has, in this case, only five keys. A greater number up to mne may be used in this bank. This bank of keys also has a detent 86 cooperating with a zero stop pawl 114 (Fig. 7 a releasing bar 100 (Fig. 5); an arm 101 and a pin 102 cooperating with an arm 103 on a sleeve 104. TlllS sleeve 104 has integral therewith an arm 115,

the free end of which lies in front of an L- shaped arm 116 integral with the sleeve 108. The three arms 106, 111 and 11 5, associated ine release shaft with the clerks key bank, department keybank and transaction key bank, respectively,

and which abut the arms 107, 112 and 116, all

integral with the sleeve 108 (Fig. 5), prevent counter-clockwise movement of said sleeve (Fig. 6), the engagement of any one of these arms serving to prevent such counter-clockwise movements. Consequently, in the normal condition of the machine, when the total lever 7 8 is in the position shown in Figs. 1

and 4, it is necessary to rock all three arms 106,111 and 115 out of the paths of the three integral arms on the sleeve 108 in order to permit counter-clockwise movement of said sleeves. Therefore, in order to move said arms a key must be depressed in the transaction, 'departmental and clerks key banks.

The sleeve 108, as previously. described, by the projection 109 and arm 110 pinned on the shaft 40, is rocked with said shaft, the latter receiving its movement from a compression spring 119 (Fig. 3) mounted in a slot 120 in a link 121. Said spring is also connected to a stud 122 on an arm 123 fast on the shaft 40.-

This spring 119 normally tends to rock the arm 123 clockwise (Fig. 3), which movement,

however, is normally prevented, as previously described. When the shaft' lO is permitted a clockwise movement (Fig. 3) by depression of a key in the transaction, departmental and clerks banks, the arm 35 (Fig. 2) is rocked clockwise, thereby effectmgthe coupling andstarting of the motor'for driving the cam shaft 50, as previously described, or permit: ting a manual operation by use of the crank handle (not shown).

It is not necessary to depress the keys in the control banks simultaneously, or in any particular sequence, because as each key 1s depressed it is held in depressed position by 1ts flexible detent 86 and locked in this position after the machine is r leased. To effect the release of the keys, near the end of the operation of the machine, the link 121 (Fig.3) is provided with? a slot 12 1, one

section of which normally embraces a pin 125 V on 'a lever 126 pivoted on a stud 127 The lever 126 carries a roller 128 engaging acamrace 129 in the gear 67. As previously stated, this gear is given a half rotation at each adding operation of the machine. Consequently, this race tion the lever 126 isrocked clockwise to lower the link 121. As the link 121 is lowered, the upper end of the slot 120 engages the stud 122 whereby theshaft 40 isrocked counterclockwise (Fig. 3) past normal position, and then permitted to rock clockwise to its normal position. I The shaftAO in. its counter-clockwise'nfovement releases all of the amount keys 129 has two nodes 130 so lok cated that near the end of the adding operadepressed in the machine to which this invention is applied.

When the shaft 40 is rocked as above described, the arm 39 (Fig.- 2) ismoved to its normal position, the lever 35 having been restored to normal locking position: by the link 55 and stud 58 before the arm 39'is moved to its normal position, as has been previously described.

The above described movementof the shaft 40 past its: normal position is employed to effect the release of the depressed transaction, departmental and clerks keys. As the shaft 40 is rocked counter-clockwise (Fig. 3), or clockwise (Fig. 6), the arms 107 112 and 116 are also rocked from their positions beneath. the, arms 106, 111 and 115. As the shaft 40 rocks past its normal. position, an

mm 141- fast, on the shaft. 40 and projections 142 and 143 on the sleeve 108 engage extensions. 144 (Fig. 6) on the flexible detentsv 86 of the three control banks and force them downwardly. Since, the releasing bars 100 are free to move upwardly after the removal of the arms 106, 111 and 115, this movement of the arm 141 and projections 1 42 and 143 145 (Figs. 5 and 6), pivoted on the shaft 105, cooperate with each of the L-shaped arms 107 112 and 116. When the machine is released, the arms 107 112 and 116 move between the arms 106, 111 and 115 and the arms 145. When the shaft 40 is rotated clockwise (Fig. 6) past normal position near'the end of the operation of the machine, the arms 107, 112 and 116 are carried rearwardly past normal positions, so that if the operator retains any of the keys 75, 76 or 77 in depressed positions, a spring 146 (Fig. 6) connecting arms 145 to arms 106, 111 and 115, will rock the arms 145 and a shoulder 147 thereon will engage the L-shaped arms 107 112 and 116, thus preventing counter-clockwise rocking of the sleeve 108 and shaft 40'to release the machine. When the operator finally removes his fingers from the depressed keys 75, 76 and 77, the arms 106, 111 and 115 will be lowered in front of the L-shaped arms 107, 112 and 116, and as the lower edges of the former arms engage the upper edges of the'arms 145, these arms at the same time are moved so that the shoulders 147 are removed from the arms 107, 112 and 116, thus permitting these arms to rock a slight distance counter-clockwise (Fig.

during a total operation. It is just as effective during total operations as during adding operations.

The total lever 78 is pivoted on a. shaft 149 (Fig. 4) and is movable in a slot 150- (Fig. 1). If the lever is moved above its central or add position, it controls the machine for sub-total or reading operations, and when moved below its add position it controls the machine for grand total or reset operations. 'When the total lever 7 8. is in position to control the machine for a sub-total or a grand total 0 eration, only one key in one of the banks 5, 76 and 77 is depressed, because at such a time only one individual totalizer is to be selected and engaged with the differential mechanism, as has been fully illustrated and described in the parent application.

Since only one key is depressed, mechanism is provided whereby it alone may release the machine, althou h in adding operations, as previously descrlbed, the depression of one key in each bank 76 and 77 is absolutely necessary.

Integral with the total lever 78 is a rack 155 (Fig. 4) meshing with a gear 156 loose on the shaft 105. Secured to the gear 156 is a drum cam 157 (Figs. 4 and 5) having a race 158 which receives a .roller 159 carried by a sleeve 160 loosely mounted on a reduced portion of the end of the sleeve 108. The sleeve 160 is held in position by a collar 161. An arm 165. securedto the sleeve 160 and bifurcated to fit the shaft 105, prevents rotation of the sleeve 160, and at the same time permits oscillation of the sleeve 108 ,to re lease the machine, as previously described.

When the total lever 78 is moved, either up or down, in the slot 150 from its central or adding position, it will, through the rack 155, gear 156, cam 158, roller 159 and sleeve 160, move the sleeve 108, as viewed in Fi 5, up one step for the transaction position. f the lever 78 is moved past this position to the department position, the sleeve 108 will then be moved down two steps, and ,if said lever is moved past the department position into the clerks position, the sleeve 108 will be moved down another step. This sliding of the sleeve 108 will, as the total lever is moved each step in the directions mentioned, move the L-shaped arms 107, 112 and 116 out of contact with two of the three arms 106, 111 and 115, so that only one of the latter arms will engage one of the former L-shaped arms. Therefore, the movement of only one of the arms 106, 111 or 115 is necessary to release the machine during a total or tub-total operation. The arm 106, 111 or 115 which abuts its associated L shaped arm and prevents the release of the machine is the arm associated with the key bank selected by the total lever to take a sub-total or total of the individual totalizer which may beselected by the desociated L-shaped arm 116. When the lever 78 is moved into either of the department positions, the clerksarm 106 and transaction arm 115 are moved out of the paths of their the total lever 78 is moved into either of the associated-arms107, 116 respectively, and the department arm 111 remains in cooperative relation with its associated arm 112. en

clerks positions, the department arm 111 and transaction arm 115 are moved out o the paths of their associated L-shaped arms 112,

116 respectively, and the clerks arm 106 re mains in cooperative relation with its associated arm 107. Therefore, it is clear that when the machine is set for total taking operations, two of the three arms 106, 111 and 115, are moved into ineffective positions, relative to their associated L-shaped arms 107, 112 and 116, depending upon the position in which the total lever is set, thus necessitating the depression of a key in one bank only to release the machine, that bank being the one corresponding to the position in which the total lever is set.

In addition to rendering any of the banks of keys 7 5, 76 or 77 singly a release bank for the machine by movement of the total lever, an interlocking mechanism is controlled, by the movement of said lever, to lock the keys in the other two of these banks not selected, so that the can not be depressed durin the total or su -total operation of the mac me.

This mechanism includes a se ent 170 (Fig. 4) secured to the total lever 8. Meshing with the segment 170is a segment 171 mounted on a shaft 172. Secured to the seg ment 171 is a bar 173 (Fig. 7) also attached to disks 174, 175 and 176 loosely mountedon nested sleeves (not shown) on the shaft 172.

Each of the disks 174, 175 and 176 hasia laterally extending flange 177 provided with one or morenotches 178. These flanges are located directly beneath downwardly extending tails 179 on the zero stop pawls 96, 113

and 114 associated with the clerks, department and transaction banks, respectively.

When the total lever 78 is in its adding position, the disks 174, 175 and 176 are in the positions shown in Fig. 7, in .which the tails 17 9 of all of the zero stop pawlsare free to move downwardly 178 and any of the keys 75, 76 or 77 can be depressed, the depression of the keys rocking their associated zero stop pawls 96, 113 or within the notches 114, as the case may be, counter-clockwise.

These are the positions assumed during adding, 0 rations. When, however, the total lever 8 is moved either up or down to selectany one of the banks of keys 75, 76 or 77 for a sub-total or total operation, the segments 170 and 171 are moved a distance suflicient to position the disks 174, 175 and'176, so that only the zero stop pawl 96, 113 or 114 associated-with the selected bank can be moved downwardly through the slot 178 in the lateral flange 17 9. When the total lever has been so moved, two of the disks will be positioned so that the unbroken sections of the flanges .177 rest beneath the tails 179, thereby preventing any movement-of their pawls and consequently preventing depression of the associated keys.

Let it be assumed that the total lever moved upwardly one step from the add p0 sition. The lever 78, by this one step of movement positions the unbroken sections of the flanges 177 (Fig. 7) on the disks 174 and 175 directly beneath the tails 17 9 on the zero stop pawls 96 and113; The notch 17 8 of the disk 176, because of/its length, will still-register with the tail 179 of the pawl 114, and since this pawl is the one associated with the transaction bank of keys 77, any key in this bank may be depressed, but the keys 75 or 7 6 can not be depressed because the unbroken sections of the flanges 177 on the disks 174 and 175 are in the paths of the pawls 96 and 113.

When the total lever is moved out of adding positions, preparatory to taking a total or sub-total, all of the amount keys are locked against depression, as is fully described in the parent application.

Means is also provided to prevent release of the machine, unless the total lever 78 has been moved to its exact position to control the machine for adding, total or sub-total operations. Means is also provided for locking the total lever 78 in any of its adjusted positions during the operation of the machine.

The total lever 78 has a roller 185 (Fig. 4) which cooperates with the scalloped edge of a lever 186 fast to a sleeve 187 loose on a stud 188 on the machine frame. Also secured to the sleeve 187 is an' arm 189having a pin 190 embraced by an arm 191 pivoted ona stud 192 on the machine frame. A spring 193 stretched between the arm 191 and a lever 194, pivoted 'on the shaft 149, tends to rock the arm 191 counter-clockwise, which, through the arm 189, rocks the lever 186 clockwise so that its scalloped upper edge contacts the roller: 185 on the total lever. The arm 191 has a lip 195 (Figs..-3 and 4) which cooperates with an arm 196 fast on'the machine release shaft 40.

When the roller 185 is positioned within any of the depressions of the scalloped edge of the lever 186,'the arm 191- will be so positioned that the lip 195 will be out of the path of movement of the arm 196, and, consequent- 1y, whenthe sleeve 108 is released, through the depression of one of the keys 75, 7 6'or 77 during a total operation, or when the sleeve 108 is released through the depression of a key in all three banks during an adding operation, the shaft 40 will be free to move clockwise (Fig. 3) under the influence of its spring 120. v

However, when the total lever is in any position, intermediate any of its positions of adjustment, the roller 185 is positioned on one of the high points of the scalloped edge of the lever 186, the lip 195 of the arm 191 will be directly in the path of movement of the arm 196 on the shaft 40, and the shaft 10 cannot be moved and the machine cannot be released. This last described mechanism insures that the total lever be set in its correct position before the machine can be released and the motor started.

After the machine has been released and begun its operation, the lower end of an arm 197, integral with the lever 194, is cammed out of a notch 198 in a disk 199 fast on the cam shaft 50, and rides upon the periphery of the disk during the entire operation. The arm 197, as it is moved out of the notch 198, causes the lever 194 to be moved so that its upper end rests beneath a flattened pin 200 on the lever 186. Therefore, during the operation of the machine the lever 186 cannot be moved downwardly, and the total lever is locked, the roller 185 being positively held in one-of the depressions of the scalloped edge of the lever 186, depending upon the position in which the total lever has been set. However, when the machine is in its home position and the arm 197 engages the notch 198,

the lever 194 is out of the path of movement of the pin 200 on the lever 186, thus permitting a-movement pfthe total lever from'adding to a total orsub-totalposition or from a a total and sub-total to the adding position.

Diferentz'al mechanism, totalizers, Micators and printing mechanism 7 Total and sub-total order to a'llowsuflicient time for the selection and engagement of any desired totalizer with the actuating racks, when a total or sub-total is to 'be printed, the main cam shaft 50 is given two continuous rotations during all total and sub-total operations, instead of one, as isthe case in adding operations. The mechanism for controlling the two rotations of the cam shaft is practically the same as that illustrated in the previously mentioned Fuller Patent. No.

Since this mechanism is fully described in the last mentioned patent, and is also described in the parent application, only so much of the mechanism will be discussed as is necessary to show'the cooperation of the interlocking mechanism and the driving mechanism during total operations.

During adding operations, the keys 75, 76 and 77 are permitted to rise to their normal positions just prior to the end of the operation of the cam shaft 50, and since in total operations this cam shaft makes two rotations, instead of one,-,it is necessary to prevent the release of the keys near the end of the first rotation and permit the release of the .keys to take place only prior to the end of the second rotation of the cam shaft 50.

When the total lever 78 is'moved either up or down out of its adding position, it moves mechanism (not shown herein but fully shown in the parent application), connected to a lever 201 (Fig. 3) ivoted to a link 202, which link carries a stu 203 entered in a slot 204 in the link 123. This link 202 carries pins 205, one on each side of a lug 206 on a slidable coupling bar 207 mounted in a groove (not shown) in the back side of a cam 208. This cam, in turn, is mounted in a recess in the gear 67 All of the detailsof this particular construction are illustrated and described in the parent case. The link 202 alsocarries a roller 209 which normally lies in a notch210 in the cam 208. In adding operations, this cam 208 does-not turn, but the gear 67 turns independently thereof. In total operations, however, the link 202 is. moved toward the left, in the direction of its length (Fig. 8), by the total lever 78, and the pins 205 move the slidable coupling bar 207 to the left, so that the small end of said bar engages a recess 211 in the gear 67 Now, when the gear 67 isturned, the cam 208 will be turned with The movement of the link 202, by the.

it. total lever; also ositions the roller 209 in the main part of t e cam 208. During total operations, the gear 67 receives,'as previously stated, one complete rotation, and therefore, the cam 208 will receive one complete ro tation.

It will be remembered that it is the node 130 in the cam race .in the gear 67 which moves the link 121 downwardly to restore the shaft 40 to its normal position and thus release the depressed keys. Since there are two ofthese nodes 130 in the gear 67, it is necessary that one of these should not be elfective'to move the link 121 downwardly at the endof the first half rotation of the gear 67. Therefore, the cam 208 is so timed that just before the first half rotation of the gear 67 the link 202 will be moved still farther to the left, in the'direction of its length (Fig. 3),

thus rocking the link 121'clockwise with the stud 122 as the pivot. When the link 121 is in this position, the pin 125, during the first clockwise movement of the lever 126, moves idly in the longest portion212 of the slot 124, thus preventing anydownward movement of the link 121. Therefore, the shaft 40 is not moved at the end of the first half rotation of the gear 67 near the end of the first rotation of the cam shaft 50.

However, before the end of the second rotation of the cam shaft 50, the cam 208 moves the link 202 to the right, thus rocking the link 121 counter-clockwise. Now, when the parts arein these positions, and the second node 130 in the gear 67 operates the lever 126, the pin 125 strikes a shoulder 213 and moves the link 121 downwardly, whereby the upper end of its slot 120 will, through the arm 123, rock the shaft 40 to cause a release of all depressed keys, so that they may be restored to their normal positions. Then when the total lever 78 is moved back to adding position the link 202 moves the link 121 to normal position'and the pin 125 assumes the position shown in Fi As the gear 49 receives two rotations during total and sub-total operations, the gear also receives two rotations. Near the end of the first rotation of the gear 48 the stud 58 thereon, by its-contact with the surface 59 of the link 55, raises the link to the position shown in Fig. 2, thus rocking the locking lever from its released position to theposition indicated in Fig. 2. However, since the stud passes off the surface 59, the spring 45 again rocks the lever clockwise into its released position, because the arm 39 on the shaft 40 is not rocked from its released position back to the position shown in Fig. 2 near the end of the first rotation of the shaft 50, due to the fact that the pin 125 (Fig. 3) operates idly in the longest portion 212 of the slot 124 in the link 121.

However, dnring the second rotation of the gear 48, the stud 58 again raises the link 55 and rocksthe locking lever 35 to its nor- 7 mal position, and immediately thereafter the -shaft 40 moves the arm 39 to its normal position, wherein the curved surface 38 thereof cooperates withthe pin 37 to maintain the lever 35 in its normal position, until again released by the depression of the proper keys r for a subsequent operation of the machine.

The rocking of the shaft 40 counter-cloc totzfil and sub-total operations is to restore the depressed key 7' 5, 76 or 77 to normal position to permit one of the arms 145 depending upon which key 7 5,7 6 or 7 7 has been depressed to be moved in front of itsassociated L-shaped arm 107, 112 or 116 (Figs. and 6) to prevent an immediate second operation of the machine. In adding operations the shaft 40 is 65 rocked farther past normal position than in (Fig. 3) past its normal position during total and sub-total operations. ing operations it is necessary to release any depressed amount keys, as well as any of the control keys, whereas during total and subtotal operations no amount keys are depressed and the shaft 40 is rocked a lesser distance, ,than during adding operations.

Since the operations of the various parts have been described throughout the specification, it is not deemed necessary to describe an operation of the mechanism.

While the form of mechanism herein shown and described is'admirably adapted to fulfill the objects primarily stated, it is to be under stood that it is not intended to confine the invention to the one form or embodiment herein disclosed, for itis susceptible of embodi- .During addment in various forms all coming within the scope of the claims which follow.

What is claimed is:

1. In a machine of the class described, the combination of a plurality of sets of depressible keys, a differentially adjustable element adapted to be adjusted to a plurality of positions, a flanged disk appropriate to each of said sets of keys and having notches in the flanges for normally permitting the operation of a key in each set, and means controlled by said differentially adjustable element for ad justing all of said disks, whereby only a key in one set may be operated.

2. Ina machine of the class described, the I combination of a pluralityof sets of depres sible keys, a differentially adjustable element adapted to be adjusted to a plurality of positions, 9. flanged disk appropriate to each of said sets of keys, and having notches in the flanges for normally permitting the operation of a key in each set, a bar connecting all of said disks, and means controlled-by said differentially adjustable element and attached to said bar for moving all of said disks" according to the adjustment of the adjustable element whereby, keys of a certain group will be operative according to the position of the adjustable element.

3. In a inachine of the class described, the combination of a plurality of sets of depressible keys, a diflerentially adjustable element adapted to be adjusted to a plurality of positions, and a pivoted frame controlledby the said differentially adjustable element and common to all of said sets of keys for select-' ing any one or all of said setslof keys for operation.

4. Ina machine of the class described, the combination of a plurality of sets of control kys, a main operating device, means normally preventing the operatioii of said main operating device, connections requiring an operation ofakey ofeach set for disabling said preventing means, a differentially adjustable element, and means controlled by said element for selecting any one of said sets of keys for operation, and thereby disabling mentioned se ment member to control the said connections for all except the selected set rockable mem er to select the desired bank of of keys, whereby said preventing means may keys.

be disabled by an operation of a key of the selected set.

5. In a machine of the class described, the combination of a plurality of sets of control keys, a main operating device, means normally efiective to prevent an operation of said main operation device, connections, intermediate said sets of controlling keys and said preventing means, requiring an operation of a key in each set to disable said preventing means, a differentially adj ustable element, adjustable to a plurality of positions, and connections controlled by said element for rendering the depression of a key in each set unnecessary, and determinin by its position, which set of keys will co trol said preventing means.

6. In a machine of the class described, the combination of a plurality of sets of depressible keys of difl'erent classes, a differentially adjustable element having a normal position common to all of said classes, and a plurality of positions of adjustment each appropriate to one of said classes, and a pivoted frame controlled by said difierentially adjustable element and common to all of said sets of keys for selecting any one or all of said classes of keys for operation.

7. In a machine 0 the class described, the combination with a plurality of sets of de pressible keys of different classes, a differentially adjustable element having a normal position appropriate to allof the classes of sets of keys, and positions of adjustment each appropriate to one of said classes, and a pivoted frame controlled by said element and commomto all of said sets of keys, whereby a key in each set maybe operated when said frame is in its .normal position, but only one of'said sets of keys may be operated when the frame is out of its normal position, determined by the position of the element.

8. In a machine of the class described, the combination of a plurality of banks of control keys, a plurality of arms, one for each bank, and adapted to be rocked by the depression of one of the keys in its appropriate bank, and a yoke'member having a plurality of notches cooperating with saidarms to permit a key in only-one of said control banks to be depressed at a time.

9. The combination of a plurality of control banks of keys; a' rockable member, including a segment member and a plurality of flanged projections having a plurality of notches, said projections and notches cooperdifferentially movable means, including a segment member cooperating with the first- In testimony whereof I afliX my signature.

FREDERICK L. FULLER. 

